INFLUENCE OF STRUCTURAL DAMAGE ON YIELDING CHARACTERISTICS OF EXPANSIVE SOILS
YAO Zhihua1，CHEN Zhenghan1，2，HUANG Xuefeng1，MIAO Qiangqiang1
(1. Department of Architectural Engineering，Logistical Engineering University，Chongqing 401331，China；2. Key Laboratory for the Exploitation of Southwest Resources and the Environment Disaster Control Engineering Under the state ministry of Education，Chongqing University，Chongqing 400044，China)
Abstract：By using CT-triaxial apparatus for unsaturated soils，compression tests under confined suction are carried out with remolded expansive soils which are suffered from multi-drying-wetting cycles. The yielding characteristics of expansive soils influenced by structural damage are researched from the viewpoint of meso-scale. The results indicate that，yielding stress would drop off gradually while the level of structural damage increases. Compression index before yielding stress appearing would increase slowly while damage level would increase gradually. Based on the test data，the quantitative equations of structural parameters along with yielding stress and macrovariable are employed for the Barcelona expansive model with structural damage.
